<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="./css/index.css" rel="stylesheet">
</head>
<body>
<p>Hello world!</p>
<svg></svg>
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<script src="./js/d3.v4.min.js"></script>
<script src="./js/index.js"></script>
</body>
</html>